It is apparent from the responses to this thread, that there is considerable confusion, amongst not only members, but also moderators and ex-moderators on this matter.

The replies so far have ranged from;  I don't know...to...yes, they are required...to...NO, they aren't...to yes and no...
There is a such a  lack of clarity that it has resulted in some members taking the approach that they will NOT upload such images.

It is also apparent that some guidance from Renderosity on this matter would not only be helpful to members and staff...but also necessary.
Certainly such clarification wil help us all going forward.

So. I'll ask one more time....Is a model release required to upload an image of an indentifiable person here at Renderosity?

In youth, we learn....with age, we understand.